Wrapping paper control mechanism



May 12, 1942. o. SANDBERG WRAPPING PAPER CONTROL MECHANISM Filed Feb. 5,1940 4 Sheets-Sheet 1 INVENTOR. Oscar fiande g BY y a ATTORNEYS.

May 12, 1942. o. SANDBERG 2,283,096

WRAPPING PAPER CONTROL MECHANISM Filed Feb. 5, 1940 4 Sheets-Sheet 2INVENTOR.

.Uecar Sandbag, BY 2 ATTORNEYS May 12, 1942; o. SANDBERG WRAPPING PAPERCONTROL MECHANISM Filed Feb. 5, 1940 4 Sheets-Sheet 4 INVENTOR. Oscarfiandbe g,

' ATTORNEYS.

llll ll. lullll lll Patented May 12, 1942 Oscar Sandberg, Defiance,

Modern Equipment Corporation,

Ohio, assignor to Defiance,

Ohio, a corporation of Ohio Application February 5, 1940, Serial No.317,369

13 Claims;

My present application has to do with a mechanism for controlling.wrapping paper supplied to a machine for wrapping articles such as candybars and the like and is a continuation-in-part of my copendingapplication, Serial No. 179,260, filed December 11, 1937, now Patent No.2,208,- 7'76, issued July 23, 1940.

One object of the invention is to provide means for supporting two websof wrapping paper, meansfor cutting thewebs into wrappers and feedingthe wrappers to position for wrapping thearticles therein, the feedingmechanism including an electric eye viewing mechanism operated by markson the web of wrapping paper and operative through speed changemechanism that propels the web of paper into the wrapping machine tochange the speed thereof and thereby keep periodic advertising materialon the wrapping paper in step with the bars as they are fed to wrappingposition so that the advertising material will always be centered onmechanism comprising two sets of V pulleys and the bars, regardless ofirregularities in paper feed A as caused by slippage and other factors.

Another object is to provide the speed changing mechanism in the form ofa shaft driven by a pair of belts, one at a higher speed than re quiredand the other at a relatively lower speed, the high speed belt beingnormally the controlling factor in paper feed and the slow speed beltbeing a modifying factor, operable if required for each of the wrappersto be cut from the web, the electric eye viewing mechanism beingoperatively associated with the slow speed belt to bring it into playand to vary the time period of such play, depending upon requirementsdetermined by the amount that each wrapper is out of step with thewrapping mechanism.

A further object is to provide means for cutting the web of wrappingpaper into sheets or wrappers somewhat longer than the bar, the cuttingmechanism being associated and tinied with the web feeding mechanism andthereby adjusted for cutting the web at the proper points by theelectric eye viewing mechanism.

Still another object is to provide wrapping paper control mechanism inwhich the web of wrappingmaterial is fed normally at a higher speed thanrequired to compensate for slippage and to provide means for slowingdown the speed for each wrapper to bqcut from the web so that thewrapper is cut at the desired place on the web, this being particularlydesirable where there are repeated patterns on the web and there is tobe one pattern for each article wrapped.

belts, one normally operating at high speed and the other one at a lowerspeed, a simple arrangement of belt tightening rollers being provided tosimultaneously loosen the high speed belt and tighten the low speedbelt, .and the rollers being operated in response to the passage ofcomplete patterns on the web past a photoelectric viewing means.

Still another object is to provide a cam means to reset the belts tonormal position after the photoelectric viewing means has caused them toshift from high speed to low speed position,

the relation of the cam and period of actuation by the photoelectricviewing means determining Another object is to provide a reservoir for Ithe adhesive and an adhesive pot in which the adhesive is deposited tothe proper depth for being picked up by the ends of rotating pins whichthen contact with the wrapping web to deposit the spots of adhesivethereon.

With these and other objects in view, my invention consists in theconstruction, arrangement and combination of the variousparts of mydevice whereby the objects contemplated are attained, as hereinaftermore fully set forth, pointed out in my claimsand illustrated in theaccompanying drawings. tion is susceptible of a variety of embodiments,it is unnecessary to fully describe and illustrate more than one inorder to give a full understanding of the invention both from itsstructural and functional standpoints. Accordingly, I have illustratedapreferred and desirable embodiment of the invention in the accompanyingdrawings, in which: I

Figure 1 is a rear elevation of a wrapping paper control mechanismembodying my invention and showing it attached to a wrapping machine ofa second copending application, Serial No. 317,370, filed February 5, 1940, which is an improvement over my application Serial No. 179,260hereinbefore mentioned. Said second co- Although the invenpendingapplication illustrates a wrapping machine designed to receive wrappersfrom the mechanism illustrated in the present application, and I willhereinafter refer to it as said second copending application.

Figure 2 is a side elevation looking from the right side of Figure 1;

Figure 2a illustrates a section of the wrapping eration of the web ofwrappingmaterial as it passes through the machine, and

Figure5 is a sectional view on the line 5 -5 of Figure 4.

The wrapping machines of said copending applications are adapted forwrapping articles of irregular. shape, such as candy bars and the like.The 'mechanism' of this application is adapted to feeda web of wrappingmaterial to the wrapping machines, to cut the web into individualwrappers and to synchronize the feeding mechanism with the cutting meansso that cutting of the wrappers from the web is performed at the desiredpoint even though the web of material may slip at times relative to itsfeeding means. Referring now to the specific construction of themechanism, 1 provide a pair of vertical frame members F, suitably andrigidly connected together and provided at their tops with a table T.Journaled in the frame members F is a main drive shaft 24'. The driveshaft 24 has secured thereto'a gear 28.

The gear is driven in any suitable manner,

such as illustrated in said second copending ap- "plication. Wrappersfor the articles wrapped in the wrapping machine of said secondapplication are supplied by the device of the present application in theform of inner and outer webs W and W of the proper width and continuousr length wound from reels R and R. The reels R and R have pintles I44supported for rotation in seats of a pair of brackets I46. To preventexcess rotation of the rolls of web W and W,

flexible straps I48 pass frictionalJy thereover and terminate in weightsI50. The webs W and W pass under a weight roller I52 carried by a pairof arms I54 pivoted at I56 to the frame members F. A stop pin I53 isprovided for the roller I52 to engage in its extreme lower position.

After passing under the roller I52, the webs W and W extend upwardlybetween an electric eye mechanism I58 and a light source thereforindicated at I60. The purpose of the electric eye mechanism is to havemarks I62 on the web W (see Figure 2a) pass the electric eye and the eyein turn regulate the speed of feeding the web and determine the positionat which it is cut into individual wrappers W" before the wrappers arewrapped around the articles to be wrapped by the wrapping machine. Thedesirable point of cutting is indicated by dotted lines I64 so that theweb, printed with a repeated pattern (one for each bar), will be outexactly between the patterns. The web W may be either Cellophane orwaxed paper printed with the trade name of the contents and of the makeror distributor thereof as is usually done, while the inner web W may betissue, waxed paper, Cellophane or the like.

The webs W and W, after leaving the electric eye I58, pass over an idlerroller I66 and then around a feed roller I68 (see Figure 4). Above theroller I68, a drive roller I10 is provided, at least the roller I10being of rubber or the like to provide a good grip on the webs W and Wand to propel them toward the table T when the roller I10 is rotatedclockwise by sprockets I84 and I85 and a chain I12. The roller I68 issimultaneously rotated counterclockwise through gears I13 and I15.

For maintaining proper pressure between the rollers I68 and I10, theshaft I14 of the roller I10 is carried at its ends by eccentric leversI18. The eccentric levers I16 are pivoted at their centers by means ofpintles I18 to brackets I80, which form the end plates for supportingthe rollers I88 and I10. The levers I16 are urged in the properdirection for moving the roller I10 toward the roller I68 by springsI82, such movement being limited by a limiting hook I82. The hook I82 issupported by a bracket I82".

The sprocket I84 for driving the chain I12 is mounted on a shaft I86.The shaft I86 is journaled in the front frame member F and in a bracketI88 secured thereto, as shown in Figure 3. The shaft I86'has securedthereto a high speed V pulley I90 and a low speed V pulley I9I. Fordriving the V pulleys I90 and I9I, I provide a pair of belts I92 andI93. The belt I92 extends a ound a V pulley I94 and the belt I93 extendsaround a smaller V pulley I96. The pulleys I94 and I96 are secured to acountershaft I98.

The countershaft in turn is driven through a clutch mechanism(consisting of a notched disc 200, an arm 202 and a pivoted dog 204)from a sprocket wheel 206. The sprocket wheel 206 is loose on the shaftI98 and is retained in position by a collar 208. The sprocket wheel 205is driven by a chain 2 I0 from a sprocket wheel 2I2. The sprocket wheel2I2 is secured to the main shaft 24.

The clutch consisting of the parts 200', 202 and 204 is adapted to bereleased and the shaft I98 to thereby be operated only when there is anarticle approaching position to be wrapped. The mechanism foraccomplishing this result includes a vertical rock shaft 2I4 journaledin brackets 2I6 extending from the rear frame member F.

At its upper end, the rock shaft 2 is provided with means to rock therock shaft and swing a lever 220 at its lower end to engage and swing alever 222 out of position in front of a shoulder 224 on the dog 204.Such means is shown as a lever 2I8 on a rock shaft 2I4 in my copendingapplication Serial No. 317,370 (Figure 3), the lever projecting to apoint to be engaged by articles being wrapped as they are advanced by aconveyor. Gravity causes the dog 204 to drop after the lever 222 hasbeen swung out of position .in front of the shoulder 224 and a hook 226on the dog to engage the notch 228 in the disc 200 as soon as the notchcomes to a position of registry with the hook. Thereupon the arm 202 andthe shaft I98 will be rotated in unison.

Each time the shaft I98 is rotated one revolution, the pulleys I94 andI98 are also rotated one revolution. The belt I92 is normally thedriving factor for the shaft I86. For this purof the revolution of the2,283,096 pose, an idler 238 is provided (see Figure 3).

pivoted at 250 on a bracket252. A spring 254.

normally-urges the'rocker arm 248 to the full line position shown.

Formoving the arm 248 to the dotted position in Figure 3, I'provide asolenoid 256 and an armature 258 to be elevated thereby when thesolenoid is energized. A second idler 260-is 'provided for the highspeed belt I92 and this idler is adjustable for the purpose of.tightening the belt to the desired degree for proper driving tractionwhen the idler 238 is in the position of-Figure 3..

Thelow speed belt I93 is normally loose, as

illustrated, andis adapted to be tightened simultaneousl with theloosening of the high speed belt I92. This is accomplished by mounting alink 262 on thelever 240 and having the lever 262 carry an idler 2.64for the belt I93. Also for the belt I93, an adjustable idler 266 isprovided to compensate for stretching ofthe belt as the machine isoperated.

From the foregoing description, it will be obvious that the spring ley238 and tighten the idler pulley 264 when- 244 will loosen the idlerpulever the solenoid 256 is energized. There would be nothing, however,to return the idlers to their initial position. To accomplish thispurpose, I provide the following described mechanism.

A rod 268 is pivoted at its upper end to the shaft 210. The shaft 210extends rearwardly from the lever 240 through an arcuate slot 212 in thefront frame member F. Back of the front frame member, a lever-214similar to the lever 240 is pivoted on the shaft I98 and supports theshaft 210 so that it can be swung through its operating cycle without.binding. The lower end of the rod 268 terminates in a fork 216straddling the main shaft 24.

The main shaft has a cam 218 thereon for propelling the rod 268 upwardlythrough the medium of a roller 280 carried by the fork 216 and engagingthe cam surface of the cam. If the stop member 246 were to remain in thedotted position of Figure 3, it will be obvious that during a periodextending over about two-thirds main shaft 24, the lever 240 would beshifted by the spring 244 to loosen the high speed belt I92 and tightenthe low speed belt I93- The duration of such period is shortened,however, by actuating the solenoid 256 so that the stop 246 is removedfrom in front of the extension 242 of the lever 240 prior to theexpiration of the two-thirds period ofrevolution mentioned. The relativeposition in the twothirds period, where the solenoid 256 operates, woulddetermine the duration of the last portion of that period effective toloosen the high speed belt and tighten the low speed belt. The speed ofthe shaft I86 and thereby of the feed rollers I68 and I19 is therebygoverned in accordance with the marks I62 on the wrapper web W in amanner which will appear when describing the operation of the machine indetail.

In Figure 3, I have also shown electrical connections from a source ofcurrent supply to the electric eye-I58, the light source I60 and thesolenoid 256. No attempt has been made to go into detail, the essentialcharacteristics being continuous energization of the light source I60and operation of the solenoid 256 only when the electric eye I58isactuated and thereby establishes a circuit for-the solenoid." I

- applying pins 282.(see-Figureg4).-

- positions 7 shaft 303 is Asthe webs Wand W pass from the roller I66 tothe roller-I68, two-spots of adhesive; 283 are applied to eachwrappersection by adhesive The pins 282 are rotated by a shaft 284- and,dip into an adhesive pot 286. .The pot 286 has a reservoirportion288... The adhesive isrpicked up from the relativelydeep part 2880f theadhesive pot 286 and transferred intothe adhesive pot proper by a gear292, driven by a pinion 294.

,The pinion 294 is mounted on the shaft v284.

The adhesive, carried upwardly by the gear 292, passes into the.adhesive pot proper over a wall 298 which serves to maintain theadhesive at a predeterminedv level for depositing the. proper amountthereof on the pins 282. The pins 282, as they rotate, contact with theweb W, thereby placing two spots of adhesive thereon-at the 283indicated in Figure 2a. The shaft 284 of the adhesive applying mechanismis driven by a sprocket 302 (seeFigure-Dt Referring to Figure 5, it willbe noted that the sprocket 302 is mounted on a shaft 303. The journaledin oneof'the end plates I80 and terminates in a Z shaped cut at 305coacting with another 2 shaped cut at 301 of asleeve 309. The sleeve 309is journaled in a bearing 3 of the glue pot 286 and is secured to theshaft 284. The shaft 284 hasthe pinion 294 mounted on it and also ahub3I5 which carries the pins 282;

The sprocket 302 is driven by achain 304 and The-sprocket 306 is mountedon the shaft I98 whi-chis driven intermittently by the clutch mechanism200, 202, 204. The chain 304 also extends around an idler sprocket 308and a cutter drive sprocket 3I0 on a shaftv 3I2.

The cutter shaft 3I2 has a cutter roll 3I3 thereon and a blade 3I4projects from the roll (see Figure 4) The blade 3 I4 is adapted to coactwith a stationary blade 3I6 for severingthe webs W and W on thedottedline I64 of Figure 2a. The blade 3I4 is set in an arbor 3I1, asshown in Figure 4, with set screws 3I8 to adjust it radially. Other setscrews 3I9 are provided to retain the adjustment.

Trailing the blade 3I4 is a semicylindrical leaf spring member 320 whichserves an important function in the web cutting operation, as willhereinafter appear. The stationary blade 3I6 is secured to a rigid crossrod 32I by cap screws 323. A web guide of the blade 3I6 by an angle bar325.

The webs W and -W' are propelled between the cutting blades 3I4 and 3I6onto the table T and individual wrappers indicated as W" are shearedtherefrom. The wrappers W" are then propelled to wrapping position bymechanism of the machine shown in said second copending application.

Practical operation 1 In the operation of my wrapping paper controlmechanism, assuming that the shaft 24 is rotating, when an articlereaches position to be wrapped, it rocks the clutch operating rock shaft2 I4 and thereby swings the clutch operating arm 222 to a position thatpermitsthe hook 226 of the dog 204to engage in the notch of theconstantly rotating clutch disc 200. This will cause the shaft I98 torotate'one revolution if only one article passes by and rocks the shaft2I4,'or to relatively deep plate'324 is supported back web and fed towrapping position only when an article also comes to wrapping position.The web feeding mechanism is normally opwrapper W" to the machine duringone revolution of the shaft I98. which corresponds to one article comingto wrapping position. The purpose of this is to compensate for anypossible slippage of the webs as they are propelled to the wrappingmachine. T cause the cutter bar 8 to function at the proper point in thelength of the webs (at the dotted line I84 in Figure 2a), the electriceye viewing mechanism I58 is provided.

Whenever one of the marks I62 of the web W asses the eye, it effectsenergization of the solenoid 256. Energization of the solenoid depressesthe stop arm 248 (see Figure 3, dotted position) to permit the highspeed belt I92 to be loosened and the low speed belt I93 to betightened, thus slowing down, for a variable period of time, therotation of the shaft I86 driven from the shaft I88. Whenever one of themarks I62 is the maximum distance ahead of where it should be (resultingfrom no slippage), then the maximum period of speed reducing iseffective. When there is slippage, then the mark will not be so farahead of its required position for proper operation of the blade 3 atthe dotted line I84 and consequently the solenoid 256 will be energizedat a relatively later period in the rotation of the shaft I98, therebyreducing the time period of speed reducing of the mechanism.

During each revolution of the shaft I98 (which rotates at the same speedas the main shaft 24) the solenoid will be energized to permit thespring 244 to shift the mechanism to slow speed position. The cam 218,each revolution of the main shaft, will reset the mechanism to highspeed position until the solenoid is again energized.

I have designed the cutting blades 3 and 3 I 6, together with theirassociated parts shown in Figures 4, 4a, 4b, 4c and 4d to provide aminimum of interference with the movement of the webs W and W as theyare fed therethrough. In

operation, the arbor 3I'I rotates clockwise in Figure 4a as the webs Wand W are fed in the direction of the arrow a. The spring blade 320, itwill be noted, resiliently engages the webs against the plate 324 to aidin the movement of the webs as the blade 3 springs toward the blade 3I6,as in Figure 412. Finally, the webs are sheared off between the trailingcorners of the blades 3 and 3H5, as shown in Figure 4c, the blade 32!!springing in toward the arbor 3I3 as it attempts to pinch the webbetween itself and the blade SIG. As soon as the blade M8 is passed bythe blade 320, then the blade 320 will swing outwardl again (as inFigure 4d) to aid in propelling the webs W and W onto the table T. Thearbor 3H being properly timed relative to the speed of feed of the websmakes it possible to quickly shear the webs into individual wrappers asthey are propelled onto the table T by the feed rollers I68 and III]without interference with their movement.

The webs W and W as they are fed onto the table T by the feed rollersI68 and III) are engaged by mechanism of the wrapping machine lreep itcontinuously rotating as long as there are articles passing insuccession to wrapping po- 1 sition. In this way, a wrapper is cut fromthe shown in said second copending application.v By the time the cuttingblade 8 severs the wrap- .per W" from the webs W and W, such mecha- Ierated by the highspeed belt I92 at a speed somewhat higher thanrequired to feed one nism has a good grip on the wrapper for effectingmovement thereof to the desired position in the wrapping machine.

. While I have shown a particular embodiment of my invention, it will beunderstood of course that I do not wish to be limited thereto since manymodifications may be made, and I therefore contemplate by the claimsappended hereto to cover any such modifications or substitutions ofmechanical equivalents as fall within the true spirit and scope of myinvention without sacritlcing any of its advantages.

I claim as new and desire to secure by Letters Patent of the UnitedStates:

1. In wrapping paper control mechanism, wrapper feed means comprising apair of feed rolls frictionally engaging a web of wrapping paper to feedthe same, cutting means for cutting the wrapping paper into individualwrappers, a source of power, a clutch between said source and said rollsand cutting means, and means for transmitting power from said clutch tosaid rolls, said transmitting means being adapted to drive said rolls atincreased or lessened speed and comprising a drive shaft controlled bysaid clutch and having a set of pulleys of different diameters thereon,a second shaft, means drivingly connecting said feed rolls with saidsecond shaft, said second shaft having a set of pulleys thereon inalignment with the pulleys on said drive shaft, belts connecting saiddrive shaft pulleys with said second shaft.

pulleys, said belts being loose on said pulleys whereby insufficienttraction is afforded to transmit power from one set to the other, meansfor selectively tightening said belts to render them operable totransmit power whereby to drive said second shaft and said rolls atdifferent speeds and comprising belt tightening rollers associated witheach of said belts, and means including a photoelectric deviceresponsive to the position of the wrapping paper with respect to saidcutting means for selectively engaging the belt tightening rollers withtheir respective belts to tighten the same.

2. In wrapping paper control mechanism, wrapper feed means comprisingfeed rolls engaging a web of wrapping paper to feed the same, cuttingmeans for cutting the wrapping paper into individual wrappers, a sourceof power, said cutting means being driven thereby, and means fortransmitting power from said source to said rolls by driving said rollsat lessened speed, said last means comprising a drive shaft operated bysaid power means and having a set of pulleys of different diametersthereon, a second shaft, means drivingly connecting said feed rolls withsaid second shaft, said second shaft having a set of pulleys thereon inalignment with the pulleys on said drive shaft, belts connecting saiddrive shaft pulleys with said second shaft pulleys, one of roller of theloose belt with its belt and disengaging the belt tightening pulley ofthe tight belt from its belt.

3. In a wrapper feed mechanism, feed rolls engaging a web of wrappingmaterial to feed the same, means for driving said rolls normally at ahigher speed than required and comprising a drive shaft and powertransmitting means comprisin high speed and low speed belts between saidrolls and drive shaft, said belts being loose, idlers for said belts,that one of said idlers for the high speed belt being normally inposition to tighten its belt, means to periodically reduce the speed ofsaid rolls to a lower speed than required comprising means to positionsaid idler 'to loosen its belt and to position the other idler totighten the low speed belt. electromagnetic means adapted to initiatesuch, last mentioned positioning of said idlers from high to low speed,a photoelectric viewing means periodically viewing spaced spots on saidweb and actuating said electromagnetic means' in response to impulsesoriginating in said photoelectric means, and a.

continuously driven rotatable cam to permit such positioning initiatedby said electromagnetic means and to re-position said idlers in theirhigh speed position. I

4. In a Wrapper feeding and cutting machine,

. means for feeding a web of wrapping material comprising a pair of feedrolls. means for cutting wrappers from said web, photoelectric means forcontrolling said rolls to feed a predetermined length of material ateach operation thereof, and 5 means for driving said rolls comprising adrive" shaft, a second shaft, means drivingly connecting said rolls withsaid second shaft. a set of pulleys on each of said shafts, the pulleyson one of said shafts being of different diameters, beltsconnecting thepulleys of one set with those of the other, said belts being looserelative to their respective pulleys. and means for selectivelytightening said belts to bring the same into tractive relation with thepulleys whereby the rolls are selectively driven at different speeds.

5. In a wrapper feeding machine, means for feeding a web of wrappingmaterial comprising feed rolls, photoelectric means for controlling.

said rolls to feed a predetermined length of material at each operationthereof, and means for driving said rolls comprising a drive shaft, a

second shaft, means drivingly connecting said rolls with said secondshaft. a set of pulleys on each of said shafts, the pulleys on one of.said shafts being of difi'erent diameters. belts connecting the pulleysof one set with those of the other, one of said belts being normallytight and the other normally loose relative to their respective p ll yloose belt and loosening said tight belt whereby the rolls areselectively driven at different speeds.

6. In a wrapper feeding machine, means for feeding a web of wrappingmaterial comprising a and means for selectively tightening said pair offeed rolls. and means for driving said rolls comprising a drive shaft. asecond shaft, means drivingly connecting said rolls with saidsecondshaft, a set of pulleys on each of said shafts, the pulleys on one ofsaid shafts being of different diameters. belts connecting the pulleysof one set with those of the other, said belts being loose relative totheir respective pulleys. and means for selectively tightening saidbelts to bring the same into tractive relation with the pulleys wherebythe rolls are selectively driven at different speeds.

'7. In a machine of the type described, means being loose relative totheir'respective pulleys,

and means for selectively tightening said belts to bring the same intotractive relation with the pulleys whereby the rolls are selectivelydriven at different speeds.

8. In a machine of the type described, means for feeding a web ofmaterial at intermittently varying speed comprising a pair of feedrolls, photoelectric means for controlling said rolls to feed apredetermined length of material at each operation thereof, and meansfor driving said rolls comprising a drive shaft, means drivinglyconnecting said driven shaft with said feed rolls, a set of pulleys oneach of said shafts, the pulleys of each set being respectively alignedand the pulleys on one of said shafts being of different diameters,belts connecting the pulleys of one set with those of the other, saidbelts being loose relative to their respective pulleys, speed changingmeans for selectively tightening said belts to bring the same intotractive relation with the pulleys whereby the rolls are selectivelydriven at different speeds, said speed changing means being normallyinoperative, and means responsive to said photoelectric means to rendersaid speed changing means operative in response to material.

9. In a wrapping machine, wrapper feed means for feeding a wrapper toposition for wrapping an article therein comprising a pair of feed rollsfrictionally engaging a web of wrapping material to feed the same, meansfor driving said rolls comprising a source of power, a clutch betweensaid source and said rolls, a clutch dog, a member controlled by anarticle to be wrapped and engageable with said clutch dog to disengagesaid clutch and disconnect said rolls .from said source,

x, means for transmitting power from said clutch to said rolls, saidtransmitting means being adapted to drive said rolls at increased orlessened speed and comprising a drive shaft controlled by said clutchand having a set of pulleys,

of difierent diameters thereon, a second shaft, means drivinglyconnecting said feed rolls with said second shaft, said second shafthaving a set of pulleys of different diameters thereon in alignment withthe pulleys on said drive shaft, belts connecting said drive shaftpulleys with said second shaft pulleys, said belts being loose on saidpulleys whereby insufl'icient traction is afforded to transmit powerfrom one set to the other, and electromagnetic means for selectivelytightening said belts to render them operable to transmit power wherebyto drive said second shaft and said rolls at different speeds,comprising belt tightening rollers associated with each wrapper feedmeans for feeding a wrapper towrapping position comprising a pair offeed rolls frictionally engaging a web of wrapping material to feed thesame, means for driving said rolls comprising a source of power, aclutch between said source and said rolls, means for transmitting powerfrom said clutch to said rolls, said transmitting means being adapted todrive said rolls at increased or lessened speed and comprising a driveshaft controlled by said clutch and' having a set of pulleys ofdifferent diameters thereon, a second shaft, means drivingly connectingsaid feed rolls with said second shaft,

said second shaft having a set of pulleys thereon in alignment with thepulleys on said drive shaft, belts connecting said drive shaft pulleyswith said second shaft pulleys, said belts being loose on said pulleyswhereby insumcient' traction is afforded to transmit power from one setto the other, and means for selectively rendering said belts operable totransmit power whereby to drive said second shaft and said rolls atdifferent speeds comprising belt tightening rollers associated with eachof said belts, and means for selectively engaging the roller with theirrespective belts to tighten the same.

11. In a wrapper control mechanism, wrapper feed means for feeding awrapper to a wrapping position comprising a pair of feed rollsfrictionally engaging a web of wrapping material to feed the same, meansfor driving said rolls comprising a source of power, a clutch between12. Mechanism for controlling intermittentsupp y of wrappers to awrapping machine comprising feeding means for a web of wrappingmaterial, cutting means for severing the web at spaced points to provideindividual wrappers for use in the wrapping machine, a drive shaft foranvmg said cutting means directly and said feeding means indirectly, adriven shaft for driving said feeding means directly, said drive anddriven shafts being provided with pulleys, normally loose belts on saidpulleys, said pulleys being of different sizes to drive said drivenshaft at two different speeds depending on which belt is tightened,idler rollers connected together for tightening one belt in one positionthereof and the other belt in the other position thereof, cam meansoperable for each wrapper cut from the web of wrapping material to causethe higher speed belt to normally be effective, photoelectric viewingmeans adapted to view spaced indicia on said web of material,electroresponsive means energized thereby upon passage of one of saidindicium relative to said photoelectric means, said electroresponsivemeans being associated with said idler rollers to shift them to theirother position to thereby tighten the slow Speed belt, said cam meanseffecting return of said idler rollers to high speed position at apredetermined point in the cycle of operation of said cutting means,thereby causing operation of said cutting means to sever a wrapper fromsaid web at a predetermined point relative to one of said indiciumthereon.

13. In mechanism for controlling periodic supply of wrappers to awrapping machine, the combination of feeding means for a web-of wrappingmaterial, cutting means for severing the web at spaced points to provideindividual wrappers, a drive shaft for driving said cutting meansdirectly and said feeding means'indirectly, a driven shaft for drivingsaid feeding means directly, said drive and driven shafts being providedwith pulleys, normally loose belts on said pulleys, said pulleys beingof different sizes to drive said driven shaft at two different speedsalternately depending on which belt is tightened, a first means fortightening one belt, a second means for tightening the other belt,photoelectric viewing means adapted to View spaced indicia on said webof material, electroresponsive means energized thereby upon passage ofone of said indicium relative to said photoelectric means, saidelectronsponsive means being associated with said first means to renderit operable, said second means being driven by said drive shaft andoperated thereby at a predetermined point in the cycle of operation ofsaid cutting means, thereby causing operation of said cutting means tosever a wrapper from said web at a predetermined point relative to saidindicium thereon.

OSCAR SANDBERG.

